linux-kernel - [PATCH] Coccinelle: Add misc/boolconv.cocci

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Date:	Thu, 23 Jun 2016 13:53:52 -0500
From:	"Andrew F. Davis" <afd@...com>
To:	Julia Lawall <Julia.Lawall@...6.fr>,
	Gilles Muller <Gilles.Muller@...6.fr>,
	Nicolas Palix <nicolas.palix@...g.fr>,
	Michal Marek <mmarek@...e.com>
CC:	<cocci@...teme.lip6.fr>, <linux-kernel@...r.kernel.org>,
	"Andrew F . Davis" <afd@...com>
Subject: [PATCH] Coccinelle: Add misc/boolconv.cocci

Add a script to check for unneeded conversions to bool.

Signed-off-by: Andrew F. Davis <afd@...com>
---
 scripts/coccinelle/misc/boolconv.cocci | 90 ++++++++++++++++++++++++++++++++++
 1 file changed, 90 insertions(+)
 create mode 100644 scripts/coccinelle/misc/boolconv.cocci

diff --git a/scripts/coccinelle/misc/boolconv.cocci b/scripts/coccinelle/misc/boolconv.cocci
new file mode 100644
index 0000000..33c464d
--- /dev/null
+++ b/scripts/coccinelle/misc/boolconv.cocci
@@ -0,0 +1,90 @@
+/// Remove unneeded conversion to bool
+///
+//# Relational and logical operators evaluate to bool,
+//# explicit conversion is overly verbose and unneeded.
+//
+// Copyright: (C) 2016 Andrew F. Davis <afd@...com> GPLv2.
+
+virtual patch
+virtual context
+virtual org
+virtual report
+
+//----------------------------------------------------------
+//  For patch mode
+//----------------------------------------------------------
+
+@...ends on patch@
+expression A, B;
+symbol true, false;
+@@
+
+(
+  A == B
+|
+  A != B
+|
+  A > B
+|
+  A < B
+|
+  A >= B
+|
+  A <= B
+|
+  A && B
+|
+  A || B
+)
+- ? true : false
+
+//----------------------------------------------------------
+//  For context mode
+//----------------------------------------------------------
+
+@r depends on !patch@
+expression A, B;
+symbol true, false;
+position p;
+@@
+
+(
+  A == B
+|
+  A != B
+|
+  A > B
+|
+  A < B
+|
+  A >= B
+|
+  A <= B
+|
+  A && B
+|
+  A || B
+)
+* ? true : false@p
+
+//----------------------------------------------------------
+//  For org mode
+//----------------------------------------------------------
+
+@...ipt:python depends on r&&org@
+p << r.p;
+@@
+
+msg = "WARNING: conversion to bool not needed here"
+coccilib.org.print_todo(p[0], msg)
+
+//----------------------------------------------------------
+//  For report mode
+//----------------------------------------------------------
+
+@...ipt:python depends on r&&report@
+p << r.p;
+@@
+
+msg = "WARNING: conversion to bool not needed here"
+coccilib.report.print_report(p[0], msg)
-- 
2.9.0